package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.time.LocalDateTime;

/**
 * 自定义切面，实现公共字段自动填充处理逻辑
 * @className
 * @description description
 * @auth xxk
 * @date 2025/7/4
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    /**
     * 切入点
     * @description description
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {}

    /**
     * 公共字段自动填充
     * @param joinPoint
     * @description description
     */
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("进行公共字段的自动填充"+joinPoint.getSignature().getName());


        //获取数据库操作类型insert/update
        MethodSignature singature = (MethodSignature) joinPoint.getSignature(); //获取方法签名
        AutoFill autoFill = singature.getMethod().getAnnotation(AutoFill.class); //获取方法上的AutoFill注解对象
        OperationType operationType = autoFill.value();


        //获取当前被拦截的方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];


        //准备赋值数据
        LocalDateTime localDateTime = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();


        //根据当前的不同操作类型，为对应的属性通过反射来赋值
        if(operationType == OperationType.INSERT) {
            try {
                //
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUserId = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象属性赋值
                setCreateTime.invoke(entity, localDateTime);
                setCreateUserId.invoke(entity, currentId);
                setUpdateTime.invoke(entity, localDateTime);
                setUpdateUser.invoke(entity, currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (operationType == OperationType.UPDATE) {
            try {
                //
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象属性赋值
                setUpdateTime.invoke(entity, localDateTime);
                setUpdateUser.invoke(entity, currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }

        }


//        log.info("注解参数："+method.getAnnotation(AutoFill.class).value());
    }
}
